java.lang.ClassCastException: incompatible with interface

Hi experts,

I am doing internalization application  facing a problem.

Below is the exception.

java.lang.ClassCastException: class com.sap.tc.webdynpro.progmodel.controller.MessageManager:service:tc~wd~webdynpro@com.sap.engine.boot.loader.ResourceMultiParentClassLoader@275cbd34@alive incompatible with interface com.sap.tut.wd.languages.MessageManager:local/TutWD_Languages_Init@com.sap.engine.boot.loader.ResourceMultiParentClassLoader@49278d23@alive

    at com.sap.tut.wd.languages.ResultView.onPlugInResult(ResultView.java:193)

    at com.sap.tut.wd.languages.wdp.InternalResultView.wdInvokeEventHandler(InternalResultView.java:123)

    at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:142)

    at com.sap.tc.webdynpro.progmodel.window.ViewController.invokeInboundPlugHandler(ViewController.java:446)

    at com.sap.tc.webdynpro.clientserver.cal.NavigationManager.processInboundPlugQueue(NavigationManager.java:305)

what could be the problem.pls provide the solution for this.

Regards

Sudheer,